root/content/browser/message_port_message_filter.cc

DEFINITIONS

1. next_routing_id_
2. OnChannelClosing
3. OnMessageReceived
4. OnDestruct
5. GetNextRoutingID
6. OnCreateMessagePort

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/message_port_message_filter.h"

#include "content/browser/message_port_service.h"
#include "content/common/message_port_messages.h"

namespace content {

MessagePortMessageFilter::MessagePortMessageFilter(
    const NextRoutingIDCallback& callback)
    : BrowserMessageFilter(MessagePortMsgStart),
      next_routing_id_(callback) {
}

MessagePortMessageFilter::~MessagePortMessageFilter() {
}

void MessagePortMessageFilter::OnChannelClosing() {
  MessagePortService::GetInstance()->OnMessagePortMessageFilterClosing(this);
}

bool MessagePortMessageFilter::OnMessageReceived(const IPC::Message& message,
                                                 bool* message_was_ok) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP_EX(MessagePortMessageFilter, message, *message_was_ok)
    IPC_MESSAGE_HANDLER(MessagePortHostMsg_CreateMessagePort,
                        OnCreateMessagePort)
    IPC_MESSAGE_FORWARD(MessagePortHostMsg_DestroyMessagePort,
                        MessagePortService::GetInstance(),
                        MessagePortService::Destroy)
    IPC_MESSAGE_FORWARD(MessagePortHostMsg_Entangle,
                        MessagePortService::GetInstance(),
                        MessagePortService::Entangle)
    IPC_MESSAGE_FORWARD(MessagePortHostMsg_PostMessage,
                        MessagePortService::GetInstance(),
                        MessagePortService::PostMessage)
    IPC_MESSAGE_FORWARD(MessagePortHostMsg_QueueMessages,
                        MessagePortService::GetInstance(),
                        MessagePortService::QueueMessages)
    IPC_MESSAGE_FORWARD(MessagePortHostMsg_SendQueuedMessages,
                        MessagePortService::GetInstance(),
                        MessagePortService::SendQueuedMessages)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP_EX()

  return handled;
}

void MessagePortMessageFilter::OnDestruct() const {
  BrowserThread::DeleteOnIOThread::Destruct(this);
}

int MessagePortMessageFilter::GetNextRoutingID() {
  return next_routing_id_.Run();
}

void MessagePortMessageFilter::OnCreateMessagePort(int *route_id,
                                                   int* message_port_id) {
  *route_id = next_routing_id_.Run();
  MessagePortService::GetInstance()->Create(*route_id, this, message_port_id);
}

}  // namespace content